Switchboard drawout having trip interlock and position indicatin

Details Switchboard drawout having trip interlock and position indicatin Switchboard drawout having trip interlock and position indicatin

1976-06-21

1977-09-27

Tolin, Gerald P.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

361339, H02B 104

Patent

active

040513351

ABSTRACT:
Drawout apparatus includes a carriage mounting a circuit breaker and supported on telescoping rails to facilitate racking movement of the circuit breaker between extreme positions of electrical engagement and disengagement with respect to switchboard primary terminals. Racking movement into the engaged position from an intermediate test position is mechanically assisted by a racking mechanism. While in the engaged position, a joint clamping mechanism is operated to perfect plural breaker-switchboard terminal joints. A trip interlock insures that the circuit breaker can only be closed while in the test position and in the engaged position with terminal joints clamped. Display apparatus indicates the various circuit breaker positions and the clamped condition of the terminal joints.

REFERENCES:
patent: 3804998 (1974-04-01), Rexroud
patent: 4004113 (1977-01-01), Ericson
patent: 4012610 (1977-03-01), Ericson

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